Re: Why won't this decorator work?

From	Gregory Ewing <greg.ewing@canterbury.ac.nz>
Newsgroups	comp.lang.python
Subject	Re: Why won't this decorator work?
Date	2011-07-04 20:22 +1200
Message-ID	<97dbigF4d1U1@mid.individual.net> (permalink)
References	(1 earlier) <mailman.561.1309628013.1164.python-list@python.org> <98cca0c2-8d4f-4313-abed-3f34fa165c6d@u28g2000yqf.googlegroups.com> <mailman.562.1309632366.1164.python-list@python.org> <a61a8a98-609a-4fb2-ba1a-45c9c1a374db@w4g2000yqm.googlegroups.com> <Xns9F17708D7849COKB@88.198.244.100>

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OKB (not okblacke) wrote:

>     	A decorator basically modifies a function/method, so that ALL 
> subsequent calls to it will behave differently.

Furthermore, usually a decorator is used when for some
reason you *can't* achieve the same effect with code
inside the function itself.

For example, the classmethod() and staticmethod()
decorators return descriptors that have different
magical effects from a standard function object when
looked up in a class or instance. Since that magic
happens *before* the function is called, you can't
do the same thing using an ordinary function.

In this case, an ordinary function is quite sufficient,
and there is no need to involve a decorator.

-- 
Greg

Thread

Why won't this decorator work? John Salerno <johnjsal@gmail.com> - 2011-07-02 09:56 -0700
  Re: Why won't this decorator work? MRAB <python@mrabarnett.plus.com> - 2011-07-02 18:33 +0100
    Re: Why won't this decorator work? John Salerno <johnjsal@gmail.com> - 2011-07-02 11:08 -0700
      Re: Why won't this decorator work? Tim Chase <python.list@tim.thechases.com> - 2011-07-02 13:45 -0500
        Re: Why won't this decorator work? John Salerno <johnjsal@gmail.com> - 2011-07-02 13:39 -0700
          Re: Why won't this decorator work? Ben Finney <ben+python@benfinney.id.au> - 2011-07-03 08:36 +1000
          Re: Why won't this decorator work? "OKB (not okblacke)" <brenNOSPAMbarn@NObrenSPAMbarn.net> - 2011-07-03 18:01 +0000
            Re: Why won't this decorator work? John Salerno <johnjsal@gmail.com> - 2011-07-03 20:24 -0700
            Re: Why won't this decorator work? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-07-04 20:22 +1200
      Re: Why won't this decorator work? Ian Kelly <ian.g.kelly@gmail.com> - 2011-07-02 12:49 -0600
        Re: Why won't this decorator work? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-07-03 16:14 +1200
      Re: Why won't this decorator work? ChasBrown <cbrown@cbrownsystems.com> - 2011-07-02 12:16 -0700
      Re: Why won't this decorator work? ChasBrown <cbrown@cbrownsystems.com> - 2011-07-02 12:17 -0700
      Re: Why won't this decorator work? ChasBrown <cbrown@cbrownsystems.com> - 2011-07-02 12:16 -0700
      Re: Why won't this decorator work? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-03 12:11 +1000
        Re: Why won't this decorator work? John Salerno <johnjsal@gmail.com> - 2011-07-02 19:14 -0700

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